Pump

ABSTRACT

A pump in which fluid is fed out through piping by compression and vacuum in a compression chamber due to linear reciprocating motion of a drive part, so as to provide a low-noise product and an energy-efficient pump. The pump has a suction port, compression chamber, outlet port, drive source having a rotating shaft; a rotating part having a central portion connected to the rotating shaft and having at least one pair of rotating-side magnets of different magnetic poles arranged in a circumferential direction; and a drive part including a pair of linear-motion-side magnets of different magnetic poles wherein the pair of linear-motion-side magnets is arranged so as to correspond to the pair of magnets, and the drive part is mounted to be able to move towards or away from the rotating part and able to perform linear reciprocating motion within the compression chamber by suction force or repulsive force between the rotating-side magnets and the liner-motion-side magnets.

TECHNICAL FIELD

The present invention relates to a pump for compressing a sucked fluid in a compression chamber and delivering the compressed fluid from an outlet port.

BACKGROUND ART

Conventionally, various types of pumps for compressing fluid have been known, for example, a reciprocating pump described in Patent Document 1 is known. As shown in FIG. 17, a drive of this pump includes: a cylindrical pump cylinder (110) of a certain size; upper and lower cylinder heads (120, 120′) that are coupled to upper and lower stages of the pump cylinder 110 in a hermetically sealed manner and have suction valves (121, 121′) and delivery valves (122, 122′) formed on both sides respectively; a pump piston (130) that is installed inside the pump cylinder (110), has a long hole (131) formed in the center therethrough, and has rack gears (132, 132′) formed to protrude on the centerlines of left and right vertical planes of the long hole (131); a drive motor (not shown) that is coupled to the center of one side of the outer surface of the pump cylinder (110) and has a rotating shaft (141) positioned on the centerline of the long hole (131) of the pump piston (130); and a pinion gear (150) that has teeth (152) of a toothed gear formed to protrude within a certain angle on a gear body (151) wherein the gear is coupled to the rotating shaft (141) of the drive motor to be engaged and rotated with the rack gears (132, 132′). In this configuration, a rotating cam (153) is coupled to a rotating shaft of the pinion gear (150), and a certain rotating space (133) is formed on one side of the rack gears (132, 132′) of the pump piston (130) corresponding to the rotating cam (153); however, for smooth operation of the rack gears (132, 132′) and the pinion gear (150), the pump piston (130) is forcibly moved up and down a certain distance in contact with upper and lower ends of the rotating space (133) when the rotating cam (153) is rotated.

Further, pressure buffer chambers (123, 123′) having certain space are formed outside the suction valves (121, 121′) and the delivery valves (122, 122′), and springs (160, 160′) with constant elastic force are disposed between the upper and lower cylinder heads (120, 120′) and corresponding ends of the pump piston (130), respectively.

CITATION LIST Patent Literature

Patent Literature 1: Korean Patent No. 10-0781391

SUMMARY OF INVENTION Technical Problem

In the reciprocating pump employing the drive motor configured as described above, since the rotating cam (153) contacts the upper and lower ends of the rotating space (133), a problem is that noise that can be generated by the rack gears (132, 132′) and the rotating cam (153) is large.

Although various forms of devices for preventing such noise can be considered, another problem is that it is impossible to reduce the size of the reciprocating pump when an additional soundproofing member is used to reduce the noise of the reciprocating pump employing the drive motor.

Further, in the reciprocating pump employing this drive motor, while the piston is reciprocated up and down by the rack gears (132, 132′), the pinion gear (150), and the rotating cam (153), there is a concern that this may cause a problem in gear durability.

An object of the present invention, which has been made in view of the above described problems, is to provide a pump in which fluid is fed out through piping by compression and vacuum in a compression chamber due to linear reciprocating motion of a drive part, so as to provide a low-noise product and an energy-efficient pump.

Another object of the present invention is to provide a high output pump which achieves a larger delivery volume of suction fluid with the same energy so that it can form higher pressure in a compression chamber.

A further object of the present invention is to provide a high capacity pump which achieves a larger delivery volume of suction fluid with the same product size.

A further object of the present invention is to provide a pump having excellent low noise and excellent durability in which a frictional surface of a drive part is minimized to a central oil-less bushing to provide reversible and smooth driving.

Solution to Problem

A pump according to the present invention is a pump having a suction port for sucking a fluid, a compression chamber for compressing the sucked fluid, and an outlet port for feeding out the compressed fluid, the pump including: a drive source having a rotating shaft; a rotating part having a central portion connected to the rotating shaft and having at least one pair of rotating-side magnets of different magnetic poles arranged in a circumferential direction; and a drive part including at least one pair of linear-motion-side magnets of different magnetic poles wherein the at least one pair of linear-motion-side magnets is arranged so as to correspond to the at least one pair of magnets of the rotating part, wherein the drive part is mounted to be able to move close to or away from the rotating part and able to perform linear reciprocating motion within the compression chamber by suction force or repulsive force between the rotating-side magnets and the liner-motion-side magnets that is displaced by rotation of the rotating part.

Further, the pump according to the present invention preferably includes: a housing head in which the suction port and the outlet port are formed; a wheel housing that houses the rotating part and the drive part; and a housing that rotatably holds the rotating shaft and fixes the drive source.

Further, in the pump according to the present invention, it is preferable that the housing head and the wheel housing are fixed via a fixing step of a drive membrane.

Further, in the pump according to the present invention, it is preferable that the compression chamber is defined by at least the housing head and the drive membrane.

The above summary of the invention does not enumerate all the necessary features of the invention, and a sub-combination of these features may also be an invention.

Advantageous Effects of Invention

According to the pump of the present invention, the drive part is driven by suction force and repulsive force of magnets, so that direct friction between parts is reduced, noise and wear are reduced, and durability is improved, and further the suction force and repulsive force of the magnets which are stronger in orthogonal direction are obtained, and the drive part is driven in linear reciprocating motion by generation of energy which is stronger than force for rotation, and thereby highly efficient energy can be obtained, and the drive part is driven while the magnets are displaced, and thereby excellent sealing force of the compression chamber is obtained, so that a high output pump having a higher delivery pressure relative to required energy and a high efficiency pump having a smaller product size relative to delivery volume can be provided.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a sectional view of a schematically arranged pump according to the present invention.

FIG. 2 is a perspective view showing some partially coupled components of a motor and a housing of the pump according to the present invention.

FIG. 3 is a perspective view showing some partially coupled components including the housing, a thrust bearing, and an inserted rotating shaft of the pump according to the present invention.

FIG. 4 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein the thrust bearing is inserted in the rotating shaft.

FIG. 5 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein a wheel housing is coupled with the housing.

FIG. 6 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein a key is coupled to the rotating shaft and a rotating plate.

FIG. 7 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein the rotating plate is fixed by a fixing nut to the rotating shaft.

FIG. 8 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein magnets are inserted in the rotating plate.

FIG. 9 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein a drive membrane is mounted and assembled on the wheel housing.

FIG. 10 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein magnets are inserted in the rotating plate and coupled to the rotating part.

FIG. 11 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein magnets are inserted in the drive membrane and coupled to the drive part.

FIG. 12 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein a compression chamber is in a vacuum state.

FIG. 13 is a perspective view showing some extracted and enlarged components of the pump according to the present invention wherein a compression chamber is in a compressed state.

FIG. 14 is a perspective view showing an appearance of the pump according to the present invention.

FIG. 15 is an extracted and enlarged perspective view of a magnet of the pump according to the present invention.

FIG. 16 is an extracted and enlarged perspective view of a housing head of the pump according to the present invention.

FIG. 17 is a configuration diagram showing a schematic block diagram of a reciprocating pump of the conventional art.

DESCRIPTION OF EMBODIMENTS

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and not all the combinations of features described in the embodiments are necessarily essential for the solution of the invention.

FIG. 1 is a sectional view in which some components of a pump are schematically arranged, and the pump includes a motor 10 as a drive source, a housing 20, a wheel housing 30, a housing head 40, thrust bearings 52, 53, a fixing pin 51, a rotating plate 60, a rotating part 70, a drive part 80, a drive membrane 90, and check valves 43, 44, which are coupled together; FIG. 2 is a perspective view showing some extracted and enlarged components wherein the motor 10 and the housing 20 are fixedly coupled; FIG. 3 is a perspective view showing some extracted and enlarged components wherein a rotating shaft 50 is inserted in a motor shaft 11 and coupled therewith by the fixing pin 51 being inserted in a pin hole 12 of the motor shaft and a pin hole 55 of the rotating shaft; FIG. 4 is a perspective view showing some extracted and enlarged components wherein the thrust bearings 52, 53 are coupled to the rotating shaft 50; FIG. 5 is a perspective view showing some extracted and enlarged components wherein the housing 20 and the wheel housing 30 are coupled with each other (not shown), and a key 34 is inserted in and coupled to a key portion 19 of the rotating shaft 50; FIG. 6 is a perspective view showing some extracted and enlarged components wherein the key 34 is inserted in the key portion 19 of the rotating shaft 50 and a key portion 69 of the rotating plate 60, so that the rotating shaft and the rotating plate are coupled with each other as if frozen, and threaded portions 64, 65 are formed to which fixing nuts are coupled to fix the rotating part 70 to the rotating plate; FIG. 7 is a perspective view showing some extracted and enlarged components wherein the rotating shaft 50 and the rotating plate 60 are coupled with a fixing nut 13 so as to be coupled not to be separated and detached from each other; FIG. 8 is a perspective view showing some extracted and enlarged components wherein magnets 67, 68, which form rotating-side magnets, are inserted in and coupled to the rotating plate 60; FIG. 9 is a perspective view showing some extracted and enlarged components wherein a fixing step 91 of the drive membrane 90 is coupled to a fixing portion 39 of the wheel housing 30; FIG. 10 is a perspective view showing some extracted and enlarged components wherein the magnets 67, 68 are inserted in and coupled to the rotating plate 60 such that their magnetisms correspond to each other, and a circular step 66, circular portions 61, 71, and the key portion 69 are formed in the central portion, so that the rotating plate 60 is fixedly coupled with the rotating shaft 50 to be able to smoothly rotate without being separated and detached therefrom while a certain space is being kept; FIG. 11 is a perspective view showing some extracted and enlarged components wherein magnets 87, 88, which form liner-motion-side magnets, are arranged so as to correspond to each other and inserted in the drive membrane 90, which is fastened and coupled to the drive part 80 and threaded portions 84, 85 by screws 17, 18, and an oil-less bushing 92 is inserted in and coupled to a center 81; and FIG. 16 is an extracted and enlarged perspective view of the shape of the housing head 40 in which a lower section is opened and formed as a circular shape, a fixing portion 49 to which a fixing step 91 is to be fixed is formed on the opened circumference surface, a cylindrical shape having openings 41, 42 at both ends of an upper section is formed, and a fixing step (not shown) and a regular-interval thread portion are formed therein.

The pump according to the present embodiment will be described in more detail with reference to the illustrated drawings, in which as shown in FIG. 12, the drive membrane 90 is driven toward the rotating part 70 by suction forces of magnets of the rotating part 70 and the drive part 80, so that a compression chamber 99 becomes in a vacuum state, and fluid is sucked through the suction port 41, and as shown in FIG. 13, the drive membrane 90 is driven apart from the rotating part 70 by repulsive forces of magnets of the rotating part 70 and the drive part 80, so that the compression chamber 99 becomes in a compressed state, and the fluid in the compression chamber 99 is delivered from the outlet port 42. The compression chamber 99 is defined by the housing head 40, the drive membrane 90, and the wheel housing 30, which will be described later.

More specifically, with reference to the accompanying drawings, a fixing portion (not shown) of the motor 10 and fixing portions 22, 23 of the housing 20 are fastened and fixed by screws (not shown), as shown in FIG. 2.

As shown in FIG. 3, the thrust bearing 52 is inserted and mounted in a bearing holder 21 of the housing 20 so that the rotating shaft 50 can support load in the axial direction, and the motor shaft 11 is inserted in the rotating shaft 50 and coupled therewith by the fixing pin 51 being inserted in the pin hole 12 of the motor 10, the pin hole 55 of the rotating shaft, and a pin hole 54 of the thrust bearing. As shown in FIG. 4, the thrust bearing 53 is inserted in the rotating shaft 50, the thrust bearing 53 is mounted to a bearing holder 31, and the housing 20 and the wheel housing 30 are fixed (not shown) and coupled with each other.

The key 34 is inserted in the key portion 19 of the rotating shaft 50 as shown in FIG. 5 and inserted in the key portion 69 of the rotating plate 60 as shown in FIG. 6, so that the rotating shaft and the rotating plate are coupled with each other, and the fixing nut 13 is coupled to the threaded portion of the rotating shaft as shown in FIG. 7, so that the rotating shaft 50 and the rotating plate 60 are coupled with each other and assembled to be able to smoothly rotate without being separated and detached.

Although the rotating shaft of the motor and the rotating plate used in the pump according to the present embodiment are preferably constructed individually and then integrated with each other, the rotating shaft and the rotating plate may be integrally constructed.

As shown in FIG. 8, in the pump according to the present embodiment, the magnets 67, 68 are arranged in magnet grooves 62, 63 of the rotating plate 60 such that their magnetisms correspond to each other, and inserted therein to be coupled with the rotating part (not shown). As shown in FIG. 9, the fixing step 91 of the drive membrane 90 is coupled and mounted to the fixing portion 39 of the wheel housing 30.

Although it is desirable that the drive membrane of the pump according to the present embodiment is separated from the wheel housing and the drive membrane is mounted to the fixing portion, the drive membrane may be formed integrally with the wheel housing, and may be fixed by an alternatively configured fixing method.

As shown in FIG. 10, in the pump according to the present embodiment, the magnets 67, 68 are inserted in magnet portions 62, 63 of the rotating plate 60 and magnet portions 72, 73 of the rotating part 70 such that their magnetisms correspond to each other, and the threaded portions 64, 65 of the rotating plate and threaded portions 74, 75 of the rotating part are fastened by screws 15, 16, and the circular step 66, the circular portions 61, 71, and the key portion 69 are formed in the central portion, so that the rotating plate is coupled with the rotating shaft 50 and arranged to be able to smoothly rotate within the wheel housing so as to allow reversible rotation without being separated and detached within the wheel housing.

As shown in FIG. 11, in the pump according to the present embodiment, the magnets 87, 88 are arranged in the drive membrane 90 such that their magnetisms correspond to each other, and inserted in magnet portions 82, 83 of the drive part 80, and threaded portions (not shown) of the drive membrane 90 and the threaded portions 84, 85 of the drive part are fastened and coupled by the screws 17, 18, the oil-less bushing 92 is inserted in the center 81 such that the fixing nut 13 is inserted therein to allow reversible rotation. Preferably, the magnets 67, 68, constituting the rotating-side magnets, and the magnets 87, 88, constituting the liner-motion-side magnets, are formed in generally cylindrical shape and configured to have S or N poles at both ends of the axial direction as shown in FIG. 15.

As shown in FIG. 12, in the pump according to the present embodiment, when the motor shaft 11 and the rotating shaft 50 of the motor 10 rotate, the rotating plate 60 and the rotating part 70 are rotated, and when the magnets 67 and 68 of the rotating part and the magnets 87, 88 of the drive part 80 are positioned on the same line with different polarities respectively, suction force is generated between the magnets 67, 68 and the magnets 87, 88 so that the drive part 80 and the drive membrane 90 are moved in a direction closer to the rotating part 70.

A vane (not shown) of the drive membrane 90 of the pump according to the present embodiment is made of soft mixed material or elastic material, and configured such that driving is controlled within a certain range, and a constant distance is maintained between the drive part 80 and the rotating part 70 even when the drive membrane 90 comes closest to the rotating part 70, so that the drive part and the rotating part do not come into contact with each other.

At this time, a vacuum is formed in the sealed compression chamber 99 by the drive membrane 90, and therefore, the fluid is sucked through the suction port into the compression chamber 99 by one check valve 44, which closes a flow path so that the fluid is sucked through the suction port 41, and the other check valve 43, which opens a flow path.

As shown in FIG. 13, in the pump according to the present embodiment, when the motor shaft 11 and the rotating shaft of the motor 10 are rotated, the rotating plate 60 and the rotating part 70 are rotated, and the magnets 67 and 68 of the rotating part and the magnets 87, 88 of the drive part 80 are positioned on the same line with the same polarities respectively, repulsive force is generated between the magnets 67, 68 and the magnets 87, 88 so that the drive part 80 and the drive membrane 90 are linearly moved within the compression chamber 99 in the direction of the compression chamber.

At this time, the sealed compression chamber 99 becomes in a compressed state by the movement of the drive membrane, and therefore, the fluid in the compression chamber is fed out through the outlet port 42 by one check valve 43, which closes a flow path so that the fluid in the compression chamber is delivered through the outlet port 42, and the other check valve 44, which opens a flow path.

Accordingly, as shown in FIG. 12, when the compression chamber 99 becomes in a vacuum state, the check valve 44 of the outlet port 42 is closed and the check valve 43 of the suction port 41 is opened so that fluid is sucked through the suction port, and as shown in FIG. 13, when the compression chamber 99 becomes in a compressed state, the check valve 43 of the suction port 41 is closed and the check valve 44 of the outlet port 42 is opened so that fluid is fed out through the outlet port.

Therefore, the pump according to the present embodiment allows continuous suction and delivery of fluid by repeatedly performing the operations of FIG. 12 and FIG. 13.

The pump according to the present embodiment is preferably configured so that the thrust bearings 52, 53 can support load of axial force as shown in FIG. 4, but may be replaced with other types of bearings or deleted.

In the pump according to the present embodiment, the shape of the rotating shaft 50 as shown in FIG. 3 may be changed to a shape not shown, and the rotating shaft 50 may be replaced with a different power transmission device.

The pump according to the present embodiment is preferably configured so that the rotating plate 60 and the rotating part 70 are separately constructed and then coupled with each other as shown in FIG. 10, but may be integrally constructed. Further, it is preferable that the drive membrane 90 and the drive part 80 are separately constructed and then coupled with each other as shown in FIG. 11, but they may be integrally constructed.

The pump according to the present embodiment is preferably configured so that the drive membrane 90 is made of soft or elastic material as shown in FIG. 11, but may be deformed into a cylinder. In addition, since the outer peripheral surface of the drive part 80 and the inner peripheral surface 33 of the wheel housing 30 are not frictioned, a pump having excellent low noise and excellent durability can be provided, and since the drive part is driven only by displacement of magnets, a high efficiency pump can be provided. It is apparent from the claims that embodiments with such modifications or improvements may also be included in the technical scope of the present invention.

REFERENCE SIGNS LIST

-   10 Motor (Drive source) -   20 Housing -   30 Wheel housing -   40 Housing head -   41 Suction port -   42 Outlet port -   50 Rotating shaft -   60 Rotating plate -   67, 68 Magnet (Rotating-side magnets) -   70 Rotating part -   80 Drive part -   87, 88 Magnet (Liner-motion-side magnets) -   90 Drive membrane -   99 Compression chamber 

1. A pump having a suction port for sucking a fluid, a compression chamber for compressing the sucked fluid, and an outlet port for feeding out the compressed fluid, the pump comprising: a drive source having a rotating shaft; a rotating part having a central portion connected to the rotating shaft and having at least one pair of rotating-side magnets of different magnetic poles arranged in a circumferential direction; and a drive part including at least one pair of linear-motion-side magnets of different magnetic poles wherein the at least one pair of linear-motion-side magnets is arranged so as to correspond to the at least one pair of magnets of the rotating part, wherein the drive part is mounted to be able to move close to or away from the rotating part and able to perform linear reciprocating motion within the compression chamber by suction force or repulsive force between the rotating-side magnets and the liner-motion-side magnets that is displaced by rotation of the rotating part.
 2. The pump according to claim 1, comprising: a housing head in which the suction port and the outlet port are formed; a wheel housing that houses the rotating part and the drive part; and a housing that rotatably holds the rotating shaft and fixes the drive source.
 3. The pump according to claim 2, wherein the housing head and the wheel housing are fixed via a fixing step of a drive membrane.
 4. The pump according to claim 3, wherein the compression chamber is defined by at least the housing head and the drive membrane. 